What is it?
Pyxel Edit is basically a pixel art editor by Daniel Kvarfordt. However, it goes beyond that. It has tools and features to help you make tilesets and animations (Including playback and onion skinning), It's interface is very simple and easy to get a grasp of and I can even be used as a level editor for your games.
Why do I like it?
It's perfect for what I do, I need to make animations and tilesets for my games. It makes the job a lot easier and quicker.
Who is it for?
Anyone into pixel art or even wanting to get into it. It can useful for both seasoned pros and noobs like me.
Where can I get it/How much does it cost?
At the time of writing it is in beta and can be yours for a donation of $9 USD or more. As it gets updated, the price will go up so it is a good idea to buy now. No further payment is required for future updates. You can also get an early alpha version for free, but that one has a lot of missing features. You can visit Pyxel Edit's website here for more information.
Any good tutorials?
Check out achebit on YouTube. He makes amazing tutorials both on pixel art and Pyxel Edit.